"Standing off at a distance of two parsecs were the Gothic Class Battlecruisers Intolerance, Indestructability and Righteous Power. Each ship carried a payload of one hundred Hellfire class nuclear missiles. The payload of a Hellfire is one hundred and twelve sub-munitions, each one with a five giga-tonne warhead. If the vanguard failed, the vessel would be fusion bombed, down to a fine powder."
-Space Hulk Rulebook, pg.3